OPERATION AND MAINTENANCE MANUAL
08-2015
3
1 TECHNICAL DESCRIPTION
1.1 PRODUCT NAME AND FEATURES
The subject of this instruction manual are flange strainers for water systems. Their feature is the
capability to capture all particles larger than 1.25-1.5 mm.
1.2 PURPOSE
Flange strainers are designed to remove contamination from the pipeline during its operation. They are
used in drinking water or industrial systems. They may be used in above-ground systems, necessarily at
easily accessible points in essentially horizontal pipelines. Installation is possible in vertical systems and
diagonally, but only when downward direction of medium flow is maintained.
1.3 TECHNICAL SPECIFICATION
Flange strainers Type 7110 are designed to protect drinking and technological water and other liquid
systems (consult the manufacturer):
- temperature:
-10
°
C – +70
°
C (120
°
C).
- range of diameters (dimensions) used:
- DN 50-300 [mm];
- max medium flow rate:
- liquid: 4[m/s];
- nominal pressure:
- PN: - 1.6 MPa;
- operating pressure range:
- 0.02-1.6 MPa;
- filtering parameters:
aperture size:
1.25 mm (ca. 27 meshes/cm
2
) for DN 50-80
1.5 mm (ca. 23 meshes/cm
2
) for DN 100-300
•
connection flanges are manufactured in accordance with PN-EN 1092-2: 1999
•
face-to-face length and its tolerances are in accordance with PN-EN 558-1
series 48
•
the selection of strainers Type 7110 depends on the levels of contamination present in the pipeline.
2 STRUCTURE
2.1 FITTING STRUCTURE DESCRIPTION
F.A. JAFAR S.A. manufactures cast iron flange strainers Type 7110 for drinking and technological
water systems. They feature cast iron body with stainless steel mesh insert (perforated sheet) with the
aperture size of 1.25-1.5 mm. The whole is equipped with a drain plug in the lower part, which allows easy
disassembly during the removal of contamination in the pipeline. The position of the filter allows capturing
contamination during unrestricted flow of the medium.
The strainer insert chamber is fitted with a cast iron cover sealed with a rubber sealing O-ring or
graphite on a steel ring and bolted to the body using hex screws. All internal and internal cast iron surfaces
of the strainer are covered with powder epoxy paint.
It is recommended to install the strainer horizontally at the lowest point of the pipeline or at
bending points.
2.2 MATERIALS
The list of materials used for strainer Type 7110 manufacturing is given in the following tables.
